Which sentence uses a verb that agrees with its subject?
a. the instructor for the afternoon exercise classes are funny and energetic.
b. some students at the library are meeting to study.
c. the containers on the shelves of the refrigerator holds leftovers.
d. a yellow cake with chocolate frosting spread between the layers are angela's choice.

The verb in the above choices, that agrees with its subject is letter B:   Some students at the library are meeting to study.   Verbs are simply known as the ‘action’ words – may it be mental, physical or mechanical. When verbs are paired with auxiliaries (helping verbs), they are known as verb phrase. These helping verbs always go first before the actual verb. 

Nostalgic i hope this .